<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>debugger</title>
</head>
<body>
<script>
    var array = [1,2,3,4,5,6,7];
    for (let i = 0; i< array.length; i++){
        // debugger; 断点
        console.log(array[i]);
    }
</script>
</body>
</html>